How do I time script execution time in PyCharm without adding code every time?

You can profile your script by hitting the ‘profile’ button (it is to the right of the ‘run’, ‘debug’, and ‘run with coverage’ buttons):

Among the output, you will find the name of the script itself, and the time needed to run it.

Note: the function is available in PyCharm PROFESSIONAL 2017.1 for the Linux platform; other installations might not provide the profiler button.